Connecting the  device to  ground is  to quickly  release the  lightning  over-voltage and 
over-current of the device, which is also a necessary measure to protect the body from 
electric shock.
In  different  environments,  the  device  may  be  grounded  differently.  The  following 
will instruct you to  connect the device to  the ground  in  two  ways,  connecting to  the 
grounding  bar  or  connecting to  the  ground  via the power  cord.  Please  connect  the 
device to ground in the optimum way according to your specific operation environment.
Connecting to the Grounding Bar
 
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If the device is installed  in the  Equipment  Room,  where  a grounding bar  is available, 
you  are  recommended  to  connect  the device  to  the  Grounding  Bar  as  shown  in the 
following figure.
Connecting to the Grounding BarFigure 3-1  
Note:  The  grounding  bar  is  not  provided  with  our  product.  If  needed,  please  self 
purchase it.
Connecting to the Ground via the Power Supply
 
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If the device is installed in the normal environment, the device can be grounded via the 
PE (Protecting Earth) cable of the AC power supply as shown in the following figure.
Connecting to the GroundFigure 3-2  
Lightning Protection